Direct Syscall in Windows Meterpreter #777
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dledda-r7
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Oct 17, 2025
dledda-r7
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cdelafuente-r7
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Thank you @dledda-r7 ! I'm happy to see metsrv will benefit from Direct Syscalls now. Great job!
I left a few minor comments for you to review when you get a chance.
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Win 11 x64 |
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…for majority of metsrv imports
… calls to use wrapper
…calls to use wrapper
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Direct Syscall in Metsrv
This PR kickstart the usage of the direct syscall implemented by @cdelafuente-r7 in the ReflectiveDllInjection repository. The scopes of this PR are:
Extending the WINAPI
With the initial winapi work we started defining wrappers for system calls for mainly two reasons:
Easier direct-syscall loader
Creation of helpers to speedup the extension of direct syscall.
To add new syscalls we need to include the syscall name and the expected arguments to the
NtDllFunction lpFunctionsTobeLoadedarray and extend theenum NtDllSyscallwith the new system call, then we can proceed with the creation of the wrappers and the optional export to themet_apiinterface.This pr include the wrappers for the ~90% of function used within metsrv.
Not all of them has been used and this is outside of the scope of this PR. smaller PRs will be done to cover smaller area of the codebase to speedup the testing.
TODO:
ZwFunctions onmet_apiMigration with Direct Syscall